No electric car here, but most of the places I've lived have had dumb meters that get checked manually each month. However, growing up in Florida, there was a

No electric car here, but most of the places I've lived have had dumb meters that get checked manually each month. However, growing up in Florida, there was a rebate program where the power company could shut off one of our circuits whenever they wanted so they could manage load. I'm pretty sure it was wired to our pool pump and maybe a few other things (like our water heater?) So I imagine power management varies by each area's need. I've heard about day/night costs, and that seems like a smarter way to balance the grid, but I haven't seen that widely implemented in the US yet. I've had "smart" water meters in a couple states. I doubt water has the same day/night load concerns electricity does, but they only varied price between summer and winter. I assume this was to discourage watering lawns.